This was because the main function of the website redesign was to inform the current users of the purifiers, those who knew and had bought the Aeris Health or Aeris Cleantec brand, that this brand had been acquired by the Roombas' company, iRobot. Also, it should be noted that this domain would be redirected to the main website once the new iRobot branded air purifiers had been released and the app had been launched.
So the redesign was based on adapting the current website of the purifiers with a visual similar to that of the home cleaning robots.